a painted cloth hung at the back of a theatre stage as part of the scenery
(剧院舞台上的)背景幕。
〈喻〉背景
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the conference took place against a backdrop of increasing diplomatic activity .会议是在外交活动日益频繁的背景下召开的。
lie behind or beyond; serve as a background to
位于…后面;位于… 远处;做…的背景
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the rolling hills that backdropped our camp. 我们营地后面连绵起伏的丘陵。